Here's the official description from IDW:
The first My Little Pony mini-series event! This month-long weekly limited series explores the secret origins of the Equestria's greatest villains! The ponies visit the imprisoned Chrysalis... what secrets is she hiding!Unarguably one of the greatest stories from the My Little Pony show is "A Canterlot Wedding." It has everything: a grand plot, emotion, and a great antagonist. Interestingly, the Queen's story didn't end there. She returned way back in the first arc of the main comic series. (Three years ago!) Now, she's back once again for the final issue of this event. It's hard to find to anything negative to say, for it is just extremely entertaining.
I think whenever we see the words "Katie Cook" and "Andy Price" on the cover excitement unveils. Whenever these two are on a comic, entertainment is guaranteed. Cook nicely writes a defeated Chrysalis, (or so it seems) to the point of even making the reader feel sorry for her at certain points. The story focuses on aspects of her villain adventures back in the day, which are surely interesting. Her origin is also explored, though that's rather underwhelming. (But, I think that was the point, to show that not every villain has a origin of how they because evil, rather they're just born with evil blood.) The ponies as expected have fantastic dialogue almost every panel. Spike's "1,000 years" comment was hilarious, as was Pinkie saying "that poor bucket" in response to Applejack using the expression "kick the bucket." Twilight's move at the end could be called controversial, but it was played just right.
Of course, Andy Price's art is fantastic. Like in the first arc all those years ago, it shows how evil and comical Queen Chrysalis can appear. The main cover by Amy Mebberson features a nicely drawn rendition of the title character. And once again, while having nothing to do with the story, the RI by Sara Richard features a unique rendition of the Mane 6, this time Applejack.
Overall, this very well could be the best issue of Fiendship. It's entertainment in every panel, and I think Chrysalis fans will really enjoy it. Looking back, I gotta say that this event was very ambitious on IDW's part. It successfully (for the most part) bridged gaps and deepened backstories of Equestria's most wanted. Sadly it's over, but it won't be forgotten!